CN107886821B - Simulation test bed for PLC teaching laboratory and data communication method thereof - Google Patents
Simulation test bed for PLC teaching laboratory and data communication method thereof Download PDFInfo
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- CN107886821B CN107886821B CN201711343995.1A CN201711343995A CN107886821B CN 107886821 B CN107886821 B CN 107886821B CN 201711343995 A CN201711343995 A CN 201711343995A CN 107886821 B CN107886821 B CN 107886821B
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- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
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- G09B23/186—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics for electricity or magnetism for circuits for digital electronics; for computers, e.g. microprocessors
Abstract
The invention relates to a simulation test bed for a PLC teaching laboratory and a data communication method thereof. By adopting a semi-physical simulation framework, the teacher station system provides rich industrial equipment simulation models, students can control the equipment models of the industrial control system through the PLC and the simulation configuration software, and the control dynamics of a controlled object can be monitored and debugged in real time, so that the practical training purpose of simulating the industrial control system is achieved, the simulation effect of the method is more vivid and closer to the actual production, and the learning interest and the creativity of the students can be effectively stimulated. The invention can provide common equipment models of motor control, automatic charging system control, forming machine control and the like in the current industry, so that the teaching practice is more suitable for actual production, and the invention is extremely favorable for cultivating the PLC application capability of students and the engineering practice capability of students.
Description
Technical Field
The invention belongs to the field of automatic teaching application, and particularly relates to a simulation test bed for a PLC teaching laboratory and a data communication method thereof.
Background
The programmable controller technology is originally generated by replacing the relay contactor control technology, and with the development of scientific technology, the technology has been developed into network control between the PLC and the PLC through single logic control and communication control between the PLC and the computer at present, and the technology has gradually penetrated into various fields and is extremely widely applied. In the aspect of education application, PLC becomes a necessary course for electrical related specialties of academics and universities of the department of industry, and a set of efficient PLC laboratory simulation method is necessary and urgent for consolidating the theoretical knowledge learned by students.
Most of the current PLC teaching experiment table devices are provided with fussy modules, so that the PLC teaching experiment table devices are large in size and single in function, although some experiment tables can integrate more than ten experiments, the learning interest of PLC beginners is also contused by complex circuits; aiming at large-scale industrial experiments, the experiment system only has a controller and no controlled object, students only can carry out verified programming operation, and no condition is connected with peripheral advanced industrial equipment to carry out experiments; the PLC controllers are mutually independent and difficult to communicate data; in addition, the practical training equipment is high in price, and in order to reduce cost, a factory simulates a complex system by using a multifunctional switch, an LED and the like on the field, the complex system cannot be simulated, the complex system is only limited to basic experiments, and the intuitiveness and interestingness of teaching are influenced. The main reason for the above phenomenon is the lack of an open PLC teaching experiment table architecture and an effective data communication method.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a novel simulation test bed facing a PLC teaching laboratory and a data communication method thereof, which are used for solving the technical problems that the experiment function of the PLC teaching laboratory is single and the simulation test of a complex system is difficult to carry out.
In order to achieve the purpose, the technical scheme of the invention is as follows: a simulation test bed facing a PLC teaching laboratory comprises a teaching station system and a student station system which are connected through a master switch Ethernet;
the teaching station system includes: an industrial personal computer, a teacher PC and a server;
the server is used for storing and operating a physical model of a controlled object of the industrial complex system, M virtual control nodes are distributed to the server, the M virtual control nodes comprise 1 teacher node and M-1 student nodes, and each control node corresponds to a specific port; the virtual control node has the function of simulating a physical control station to execute a control program;
the industrial personal computer is connected with M-1 student PLCs of the student station system through hard wiring, and each input/output signal of the industrial personal computer can respectively correspond to input/output relays inside the M-1 student PLCs one by one; the industrial personal computer is used for collecting all input and output data of the M-1 student PLC and providing a data transmission channel between a monitoring interface program on a student PC of the student station and a logic control program in the M-1 student PLC;
the teacher PC is provided with simulation configuration software; the simulation configuration software comprises logic configuration software, monitoring interface software and a communication interface module; the monitoring interface software is used for designing a physical model of the controlled object and displaying the control effect of the controlled object; the logic configuration software is used for compiling the control logic of the controlled object and realizing the preset control function;
the server and the industrial personal computer are both loaded with data relocation software, and the data relocation software is used for realizing data relocation and sharing between each virtual control node of the server and the internal memory of the industrial personal computer;
the student station system includes: m-1 student stations, wherein each student station consists of a student PLC and a student PC which are connected through a switchboard;
the student PC is provided with simulation configuration software; the simulation configuration software comprises logic configuration software, monitoring interface software and a communication interface module; the monitoring interface software is used for designing a physical model of the controlled object and displaying the control effect of the controlled object; the logic configuration software is used for compiling the control logic of the controlled object, realizing the preset control function and downloading the preset control function to the student PLC for operation.
In an embodiment of the invention, the working principle of the simulation test bed is that a student PLC of a student station is connected with a serial port of a student PC, a simulation model of a controlled object of a control system is constructed by using simulation configuration software, and the purpose of simulation under a semi-physical condition is achieved by operating the simulation model and a control configuration program on a teacher PC and the student PC.
In an embodiment of the present invention, the simulation model of the controlled object can be modified through the corresponding component of the monitoring interface, so as to implement online modification and debugging of the system control program.
The invention also provides a data communication method based on the simulation test bed for the PLC teaching laboratory, which comprises the following steps,
step S1, the teacher downloads the physical model data of the controlled device to the virtual control node corresponding to the server through the monitoring interface software of the teacher PC;
step S2, when a student starts an experiment, designing a test picture on a student PC through monitoring interface software, triggering a control instruction of controlled equipment on the designed test picture, and sending a control instruction signal value to a corresponding virtual control node address on a server;
s3, using data transfer software to transfer the corresponding control instruction data on each virtual control node in the server to the input memory area of the industrial personal computer;
s4, transmitting the control instruction data of the industrial personal computer to the corresponding student PLC through hard wiring;
s5, the student writes a control program of the controlled object through the logic configuration program of the student PC, and loads the control program into the student PLC for execution;
step S6, the student PLC transmits the executed control output result to the industrial personal computer through hard wiring;
s7, transferring the input and output values of the industrial personal computer to a virtual control node corresponding to the server through data transfer software, and driving the calculation of a physical model of the controlled equipment to realize the execution of the action of the controlled equipment;
step S8, reading a numerical value from a virtual control node corresponding to the server through monitoring interface software of the student PC, and dynamically displaying the control state of the controlled object;
and S9, the student judges whether the test requirement is completed or not through the dynamic condition of the monitoring interface, if the test requirement is met, the test is ended, if the expected effect is not achieved, the control program of the PLC of the student is continuously modified, the steps S5, S6, S7 and S8 are repeated until the test requirement effect is achieved, and the test is ended.
Compared with the prior art, the invention has the following beneficial effects:
1. the simulation test bed provided by the invention adopts a semi-physical simulation framework, the teacher station system provides rich industrial equipment simulation models, and students can control the equipment model of the industrial control system through the PLC and the simulation configuration software to monitor and debug the control dynamics of the controlled object in real time, so that the practical training purpose of simulating the industrial control system is achieved, the simulation effect of the method is more vivid and closer to the actual production, and the learning interest and creativity of the students can be effectively stimulated. For example, common equipment models of motor control, automatic charging system control, forming machine control and the like in the current industry can be provided, so that the teaching practice is more suitable for actual production, and the teaching practice is extremely favorable for cultivating the PLC application capability of students and the engineering practice capability of the students;
2. the communication method of the simulation test bed provided by the invention utilizes the data transfer function of the data relocation software and the industrial personal computer, so that the test bed framework has higher flexibility and expandability. Under the condition that system software and network architecture are not changed, various hardware in the system, including PC, PLC, industrial personal computer and the like, can not limit manufacturer sources, laboratories can independently purchase, upgrade or replace, and hardware devices of student stations can be flexibly adjusted and expanded according to the quantity of students and the requirements of experimental teaching.
Drawings
FIG. 1 is a diagram of the hardware architecture of the simulation test stand of the present invention.
FIG. 2 is a schematic diagram of data communication of the simulation test stand according to the present invention.
Detailed Description
The technical scheme of the invention is specifically explained below with reference to the accompanying drawings.
The simulation test bed for the PLC teaching laboratory comprises a teaching station system and a student station system, wherein the teaching station system and the student station system are connected through a master switch Ethernet;
the teaching station system includes: an industrial personal computer, a teacher PC and a server;
the server is used for storing and operating a physical model of a controlled object of the industrial complex system, M virtual control nodes are distributed to the server, the M virtual control nodes comprise 1 teacher node and M-1 student nodes, and each control node corresponds to a specific port; the virtual control node has the function of simulating a physical control station to execute a control program;
the industrial personal computer is connected with M-1 student PLCs of the student station system through hard wiring, and each input/output signal of the industrial personal computer can respectively correspond to input/output relays inside the M-1 student PLCs one by one; the industrial personal computer is used for collecting all input and output data of the M-1 student PLC and providing a data transmission channel between a monitoring interface program on a student PC of the student station and a logic control program in the M-1 student PLC;
the teacher PC is provided with simulation configuration software; the simulation configuration software comprises logic configuration software, monitoring interface software and a communication interface module; the monitoring interface software is used for designing a physical model of the controlled object and displaying the control effect of the controlled object; the logic configuration software is used for compiling the control logic of the controlled object and realizing the preset control function;
the server and the industrial personal computer are both loaded with data relocation software, and the data relocation software is used for realizing data relocation and sharing between each virtual control node of the server and the internal memory of the industrial personal computer;
the student station system includes: m-1 student stations, wherein each student station consists of a student PLC and a student PC which are connected through a switchboard;
the student PC is provided with simulation configuration software; the simulation configuration software comprises logic configuration software, monitoring interface software and a communication interface module; the monitoring interface software is used for designing a physical model of the controlled object and displaying the control effect of the controlled object; the logic configuration software is used for compiling the control logic of the controlled object, realizing the preset control function and downloading the preset control function to the student PLC for operation.
The working principle of the simulation test bed is that a student PLC of a student station is connected with a serial port of a student PC, a simulation model of a controlled object of a control system is constructed by using simulation configuration software, and the purpose of simulation under a semi-physical condition is achieved by running the simulation model and a control configuration program on a teacher PC and the student PC. The simulation model of the controlled object can be modified through the corresponding component of the monitoring interface, so that the system control program can be modified and debugged on line.
The invention also provides a data communication method based on the simulation test bed for the PLC teaching laboratory, which comprises the following steps,
step S1, the teacher downloads the physical model data of the controlled device to the virtual control node corresponding to the server through the monitoring interface software of the teacher PC;
step S2, when a student starts an experiment, designing a test picture on a student PC through monitoring interface software, triggering a control instruction of controlled equipment on the designed test picture, and sending a control instruction signal value to a corresponding virtual control node address on a server;
s3, using data transfer software to transfer the corresponding control instruction data on each virtual control node in the server to the input memory area of the industrial personal computer;
s4, transmitting the control instruction data of the industrial personal computer to the corresponding student PLC through hard wiring;
s5, the student writes a control program of the controlled object through the logic configuration program of the student PC, and loads the control program into the student PLC for execution;
step S6, the student PLC transmits the executed control output result to the industrial personal computer through hard wiring;
s7, transferring the input and output values of the industrial personal computer to a virtual control node corresponding to the server through data transfer software, and driving the calculation of a physical model of the controlled equipment to realize the execution of the action of the controlled equipment;
step S8, reading a numerical value from a virtual control node corresponding to the server through monitoring interface software of the student PC, and dynamically displaying the control state of the controlled object;
and S9, the student judges whether the test requirement is completed or not through the dynamic condition of the monitoring interface, if the test requirement is met, the test is ended, if the expected effect is not achieved, the control program of the PLC of the student is continuously modified, the steps S5, S6, S7 and S8 are repeated until the test requirement effect is achieved, and the test is ended.
The following is a specific embodiment of the present invention.
The simulation test bed for the PLC teaching laboratory provided by the invention adopts a PLC-based semi-physical simulation framework, and as shown in FIG. 1, the simulation test bed specifically comprises the following components:
1. the teaching station system and the student station system are connected through a master switch Ethernet.
2. The teaching station system includes: a large-scale industrial personal computer, a teacher PC and a server.
(1) The server is mainly used for storing and operating a physical model of a controlled object of the industrial complex system, M virtual control nodes are distributed to the server, the M virtual control nodes comprise 1 teacher node and M-1 student nodes, and each control node corresponds to a specific port; the virtual control node has a function of simulating a physical control station to execute a control program.
(2) The industrial personal computer is connected with M-1 small-sized PLCs of the student station system through hard wiring, and each input/output signal of the industrial personal computer can correspond to an input/output relay in the PLCs one by one respectively. The industrial personal computer is used for collecting all input and output data of the M-1 small-sized PLCs and providing a data transmission channel between a monitoring interface program on a PC of the student station and a logic control program in the small-sized PLCs.
(3) The server and the industrial personal computer are both provided with data relocation software which is mainly used for realizing data relocation and sharing between each virtual control node of the server and the internal memory of the industrial personal computer.
3. The student station system includes: m-1 student stations, each student station comprises a set of PLC equipment and student PC, and the two are connected through branch switch.
(1) And the student PC and the teacher PC are both provided with simulation configuration software.
(2) The simulation configuration software mainly comprises logic configuration software, monitoring interface software and a communication interface module; the monitoring interface software is used for designing a physical model of the controlled object and displaying the control effect of the controlled object;
(3) the logic configuration software is used for compiling the control logic of the controlled object, realizing a specific control function and downloading the control logic to the small PLC for operation.
(II) the simulation test bed for the PLC teaching laboratory of the invention comprises: the working principle of the provided simulation test bed is that a PLC (programmable logic controller) of a student station is connected with a PC (personal computer) serial port, a simulation model of a controlled object of a control system is constructed by utilizing simulation configuration software, and the purpose of simulation under a semi-physical condition is achieved by running the simulation model and a control configuration program on the PC. Furthermore, the simulation model of the controlled object can be modified through the corresponding component of the monitoring interface, so that the system control program can be modified and debugged on line.
The invention also provides a data communication method based on the simulation test bed for the PLC teaching laboratory, which is shown in figure 2 and has the following specific principle:
1. and the teacher downloads the physical model data of the controlled equipment to the virtual control node corresponding to the server through the monitoring interface software of the teacher PC.
2. When a student starts an experiment, designing a test picture on a student PC through monitoring interface software, triggering a control instruction (such as starting operation of certain equipment) of controlled equipment on the designed test picture, and sending a control instruction signal value to a corresponding virtual control node address on a server;
3. using data relocation software to relocate corresponding control instruction data on each virtual control node in the server to an input memory area of the industrial personal computer;
4. transmitting the control instruction data of the industrial personal computer to the corresponding small PLC through hard wiring;
(the steps 2, 3 and 4 can be realized by transmitting the start-stop operation data of the monitoring picture on the PC of the student to the corresponding memory of the small PLC.)
5. The students compile a control program of a controlled object through a logic configuration program of a student PC and load the control program into the small PLC for execution;
6. the small PLC transmits the executed control output result to the industrial personal computer through hard wiring;
7. the input and output values of the industrial personal computer are migrated to the virtual control nodes corresponding to the server through data migration software, the calculation of the physical model of the controlled equipment is driven, and the execution of the action of the controlled equipment is realized;
8. reading a numerical value from a virtual control node corresponding to the server through monitoring interface software of the student PC, and dynamically displaying the control state of the controlled object;
9. and (4) the students judge whether the test requirements are finished or not through the dynamic condition of the monitoring interface, if the test requirements are met, the test is finished, if the expected effect is not achieved, the control program of the small PLC is continuously modified, and 5, 6, 7 and 8 are repeated until the test requirements are met, so that the test is finished.
The above are preferred embodiments of the present invention, and all changes made according to the technical scheme of the present invention that produce functional effects do not exceed the scope of the technical scheme of the present invention belong to the protection scope of the present invention.
Claims (4)
1. The utility model provides a simulation test bench towards PLC teaching laboratory which characterized in that: the teaching station system and the student station system are connected through a master switch Ethernet;
the teaching station system includes: an industrial personal computer, a teacher PC and a server;
the server is used for storing and operating a physical model of a controlled object of the industrial complex system, M virtual control nodes are distributed to the server, the M virtual control nodes comprise 1 teacher node and M-1 student nodes, and each control node corresponds to a specific port; the virtual control node has the function of simulating a physical control station to execute a control program;
the industrial personal computer is connected with M-1 student PLCs of the student station system through hard wiring, and each input/output signal of the industrial personal computer can respectively correspond to input/output relays inside the M-1 student PLCs one by one; the industrial personal computer is used for collecting all input and output data of the M-1 student PLC and providing a data transmission channel between a monitoring interface program on a student PC of the student station and a logic control program in the M-1 student PLC;
the teacher PC is provided with simulation configuration software; the simulation configuration software comprises logic configuration software, monitoring interface software and a communication interface module; the monitoring interface software is used for designing a physical model of the controlled object and displaying the control effect of the controlled object; the logic configuration software is used for compiling the control logic of the controlled object and realizing the preset control function;
the server and the industrial personal computer are both loaded with data relocation software, and the data relocation software is used for realizing data relocation and sharing between each virtual control node of the server and the internal memory of the industrial personal computer;
the student station system includes: m-1 student stations, wherein each student station consists of a student PLC and a student PC which are connected through a switchboard;
the student PC is provided with simulation configuration software; the simulation configuration software comprises logic configuration software, monitoring interface software and a communication interface module; the monitoring interface software is used for designing a physical model of the controlled object and displaying the control effect of the controlled object; the logic configuration software is used for compiling the control logic of the controlled object, realizing the preset control function and downloading the preset control function to the student PLC for operation.
2. The PLC teaching laboratory-oriented simulation test bench of claim 1, wherein: the working principle of the simulation test bed is that a student PLC of a student station is connected with a serial port of a student PC, a physical model of a controlled object of a control system is constructed by using simulation configuration software, and the purpose of simulation under a semi-physical condition is achieved by running the physical model and a control configuration program on a teacher PC and the student PC.
3. The PLC teaching laboratory-oriented simulation test bench of claim 2, wherein: the physical model of the controlled object can be modified through the corresponding component of the monitoring interface, so that the system control program can be modified and debugged on line.
4. A data communication method for a simulation test bed of a PLC teaching laboratory based on any one of claims 1 to 3, characterized in that: comprises the following steps of (a) carrying out,
step S1, the teacher downloads the physical model data of the controlled object to the virtual control node corresponding to the server through the monitoring interface software of the teacher PC;
step S2, when a student starts an experiment, designing a test picture on a student PC through monitoring interface software, triggering a control instruction of a controlled object on the designed test picture, and sending a control instruction signal value to a corresponding virtual control node address on a server;
s3, using data transfer software to transfer the corresponding control instruction data on each virtual control node in the server to the input memory area of the industrial personal computer;
s4, transmitting the control instruction data of the industrial personal computer to the corresponding student PLC through hard wiring;
s5, the student writes a control program of the controlled object through the logic configuration software of the student PC, and loads the control program into the student PLC for execution;
step S6, the student PLC transmits the executed control output result to the industrial personal computer through hard wiring;
s7, transferring the input and output values of the industrial personal computer to a virtual control node corresponding to the server through data transfer software, and driving the calculation of a physical model of the controlled object to realize the execution of the action of the controlled object;
step S8, reading a numerical value from a virtual control node corresponding to the server through monitoring interface software of the student PC, and dynamically displaying the control state of the controlled object;
and S9, the student judges whether the test requirement is completed or not through the dynamic condition of the monitoring interface, if the test requirement is met, the test is ended, if the expected effect is not achieved, the control program of the PLC of the student is continuously modified, the steps S5, S6, S7 and S8 are repeated until the test requirement effect is achieved, and the test is ended.
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| CN108470506A (en) * | 2018-04-09 | 2018-08-31 | 重庆鲁班机器人技术研究院有限公司 | Half robot teaching's device in kind |
| CN108762188A (en) * | 2018-06-05 | 2018-11-06 | 湖南商学院 | Fireworks based on PLC controls sort assembly line Virtual Simulative Experiment method and system |
| CN109754683A (en) * | 2019-03-04 | 2019-05-14 | 中国矿业大学 | A kind of half full-scale investigation device of PLC towards classroom instruction |
| CN110688050A (en) * | 2019-09-17 | 2020-01-14 | 上海海洋大学 | Use method of touch screen |
| CN112462627A (en) * | 2020-12-09 | 2021-03-09 | 中交一航局安装工程有限公司 | Port control system simulation test system and test method |
| CN114596746A (en) * | 2022-02-24 | 2022-06-07 | 烽台科技（北京）有限公司 | Simulation education training system and learning method based on simulation education training system |
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| CN202230624U (en) * | 2011-08-05 | 2012-05-23 | 陕西科技大学 | Computer comprehensive simulation experiment platform based on PLC |
| CN103019102B (en) * | 2012-11-28 | 2014-10-29 | 河南科技大学东海硅产业节能技术研究院 | Semi-physical computer simulation network experimental apparatus |
| CN203812071U (en) * | 2014-04-17 | 2014-09-03 | 浙江先锋教育设备有限公司 | Integrated experiment device for industrial automation industrial control network control |
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